Carver, Martin, and Cecily Spall. “Excavating a Parchmenerie : Archaeological Correlates of Making Parchment at the Pictish Monastery at Portmahomack, Easter Ross”. Proceedings of the Society of Antiquaries of Scotland 134 (November 30, 2005): 183–200. Accessed May 4, 2024. https://journals.socantscot.org/index.php/psas/article/view/9605.